HN210 Lecture Notes - Lecture 12: Ulna, Epicondyle, Head Of Radius
Document Summary
I: lateral and adjacent posterior and anterior aspects of radius below radial head. A: supinates forearm: rotates radius to turn palm (elbow fixed ) O: posterior surface of ulna below supinator origin, posterior surface of ulna below supinator insertion and interosseous membrane. I: anterolateral side of base of 1st metacarpal. A: abducts thumb and extends 1st metacarpal joint following opposition. O: radius and interosseous membrane below pollicis abductor longus. I: proximal phalanx of thumb, extends beyond metacarpal phalangeal joint. A: extends proximal phalanx and metacarpal of the thumb. O: radial side of the ulna, middle 1/3 of ulna and adjacent interosseous membrane. I: distal phalanx , extends beyond point of brevis muscle. A: extend both phalanges ( metacarpal phalangeal joint, carpometacarpal joint and interphalangeal joint) O: posterior surface of ulna (distal 1/3) and interosseous membrane. I: distal end of 2nd metacarpal (index finger) into extensor expansion of 2nd digit.
